When is 52 weeks not equal to a year? Refer to the previous exercise. The researchers also had 60 marketing students read an announcement about a construction project. The expected duration was either one year or 52 weeks. Each student was then asked to state the earliest and latest completion date.

Group n x s 52 weeks 30 84.1 55.8 1 year 30 139.6 73.1 Test that the average interval is the same for the two groups using the  5 0.05 significance level. Report the test statistic, the degrees of freedom, and the P-value. Give a short summary of your conclusion.